Merge remote branch 'korg/drm-core-next' into drm-next-stage

* korg/drm-core-next:
  drm/ttm: handle OOM in ttm_tt_swapout
  drm/radeon/kms/atom: fix shr/shl ops
  drm/kms: fix spelling of "CLOCK"
  drm/kms: fix fb_changed = true else statement
  drivers/gpu/drm/drm_fb_helper.c: don't use private implementation of atoi()
  drm: switch all GEM/KMS ioctls to unlocked ioctl status.
  Use drm_gem_object_[handle_]unreference_unlocked where possible
  drm: introduce drm_gem_object_[handle_]unreference_unlocked

drivers/gpu/drm/drm_crtc_helper.c

@@ -836,11 +836,7 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
 			mode_changed = true;
 		} else if (set->fb == NULL) {
 			mode_changed = true;
-		} else if ((set->fb->bits_per_pixel !=
-			 set->crtc->fb->bits_per_pixel) ||
-			 set->fb->depth != set->crtc->fb->depth)
-			fb_changed = true;
-		else
+		} else
 			fb_changed = true;
 	}
 

drivers/gpu/drm/drm_drv.c

@@ -125,28 +125,28 @@ static struct drm_ioctl_desc drm_ioctls[] = {
 
 	DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_update_drawable_info, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 
-	DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, 0),
-	DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH),
-	DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH),
-
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_MASTER|DRM_CONTROL_ALLOW),
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_MASTER|DRM_CONTROL_ALLOW),
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW),
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_MASTER),
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER),
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_MASTER|DRM_CONTROL_ALLOW),
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_MASTER|DRM_CONTROL_ALLOW),
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_mode_attachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_mode_detachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_MASTER | DRM_CONTROL_ALLOW),
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_MASTER|DRM_CONTROL_ALLOW),
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_MASTER|DRM_CONTROL_ALLOW),
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_MASTER|DRM_CONTROL_ALLOW),
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW),
-	DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW)
+	DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
+
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_MASTER|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_mode_attachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_mode_detachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_MASTER | DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
+	DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED)
 };
 
 #define DRM_CORE_IOCTL_COUNT	ARRAY_SIZE( drm_ioctls )

drivers/gpu/drm/drm_fb_helper.c

@@ -27,6 +27,7 @@
  *      Dave Airlie <airlied@linux.ie>
  *      Jesse Barnes <jesse.barnes@intel.com>
  */
+#include <linux/kernel.h>
 #include <linux/sysrq.h>
 #include <linux/fb.h>
 #include "drmP.h"
@@ -50,21 +51,6 @@ int drm_fb_helper_add_connector(struct drm_connector *connector)
 }
 EXPORT_SYMBOL(drm_fb_helper_add_connector);
 
-static int my_atoi(const char *name)
-{
-	int val = 0;
-
-	for (;; name++) {
-		switch (*name) {
-		case '0' ... '9':
-			val = 10*val+(*name-'0');
-			break;
-		default:
-			return val;
-		}
-	}
-}
-
 /**
  * drm_fb_helper_connector_parse_command_line - parse command line for connector
  * @connector - connector to parse line for
@@ -111,7 +97,7 @@ static bool drm_fb_helper_connector_parse_command_line(struct drm_connector *con
 			namelen = i;
 			if (!refresh_specified && !bpp_specified &&
 			    !yres_specified) {
-				refresh = my_atoi(&name[i+1]);
+				refresh = simple_strtol(&name[i+1], NULL, 10);
 				refresh_specified = 1;
 				if (cvt || rb)
 					cvt = 0;
@@ -121,7 +107,7 @@ static bool drm_fb_helper_connector_parse_command_line(struct drm_connector *con
 		case '-':
 			namelen = i;
 			if (!bpp_specified && !yres_specified) {
-				bpp = my_atoi(&name[i+1]);
+				bpp = simple_strtol(&name[i+1], NULL, 10);
 				bpp_specified = 1;
 				if (cvt || rb)
 					cvt = 0;
@@ -130,7 +116,7 @@ static bool drm_fb_helper_connector_parse_command_line(struct drm_connector *con
 			break;
 		case 'x':
 			if (!yres_specified) {
-				yres = my_atoi(&name[i+1]);
+				yres = simple_strtol(&name[i+1], NULL, 10);
 				yres_specified = 1;
 			} else
 				goto done;
@@ -170,7 +156,7 @@ static bool drm_fb_helper_connector_parse_command_line(struct drm_connector *con
 		}
 	}
 	if (i < 0 && yres_specified) {
-		xres = my_atoi(name);
+		xres = simple_strtol(name, NULL, 10);
 		res_specified = 1;
 	}
 done:
@@ -694,7 +680,7 @@ int drm_fb_helper_set_par(struct fb_info *info)
 	int i;
 
 	if (var->pixclock != 0) {
-		DRM_ERROR("PIXEL CLCOK SET\n");
+		DRM_ERROR("PIXEL CLOCK SET\n");
 		return -EINVAL;
 	}
 

drivers/gpu/drm/drm_gem.c

@@ -192,9 +192,7 @@ drm_gem_handle_delete(struct drm_file *filp, u32 handle)
 	idr_remove(&filp->object_idr, handle);
 	spin_unlock(&filp->table_lock);
 
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_handle_unreference(obj);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_handle_unreference_unlocked(obj);
 
 	return 0;
 }
@@ -325,9 +323,7 @@ drm_gem_flink_ioctl(struct drm_device *dev, void *data,
 	}
 
 err:
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(obj);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(obj);
 	return ret;
 }
 
@@ -358,9 +354,7 @@ drm_gem_open_ioctl(struct drm_device *dev, void *data,
 		return -ENOENT;
 
 	ret = drm_gem_handle_create(file_priv, obj, &handle);
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(obj);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(obj);
 	if (ret)
 		return ret;
 
@@ -390,7 +384,7 @@ drm_gem_object_release_handle(int id, void *ptr, void *data)
 {
 	struct drm_gem_object *obj = ptr;
 
-	drm_gem_object_handle_unreference(obj);
+	drm_gem_object_handle_unreference_unlocked(obj);
 
 	return 0;
 }
@@ -403,16 +397,25 @@ drm_gem_object_release_handle(int id, void *ptr, void *data)
 void
 drm_gem_release(struct drm_device *dev, struct drm_file *file_private)
 {
-	mutex_lock(&dev->struct_mutex);
 	idr_for_each(&file_private->object_idr,
 		     &drm_gem_object_release_handle, NULL);
 
 	idr_destroy(&file_private->object_idr);
-	mutex_unlock(&dev->struct_mutex);
+}
+
+static void
+drm_gem_object_free_common(struct drm_gem_object *obj)
+{
+	struct drm_device *dev = obj->dev;
+	fput(obj->filp);
+	atomic_dec(&dev->object_count);
+	atomic_sub(obj->size, &dev->object_memory);
+	kfree(obj);
 }
 
 /**
  * Called after the last reference to the object has been lost.
+ * Must be called holding struct_ mutex
  *
  * Frees the object
  */
@@ -427,13 +430,39 @@ drm_gem_object_free(struct kref *kref)
 	if (dev->driver->gem_free_object != NULL)
 		dev->driver->gem_free_object(obj);
 
-	fput(obj->filp);
-	atomic_dec(&dev->object_count);
-	atomic_sub(obj->size, &dev->object_memory);
-	kfree(obj);
+	drm_gem_object_free_common(obj);
 }
 EXPORT_SYMBOL(drm_gem_object_free);
 
+/**
+ * Called after the last reference to the object has been lost.
+ * Must be called without holding struct_mutex
+ *
+ * Frees the object
+ */
+void
+drm_gem_object_free_unlocked(struct kref *kref)
+{
+	struct drm_gem_object *obj = (struct drm_gem_object *) kref;
+	struct drm_device *dev = obj->dev;
+
+	if (dev->driver->gem_free_object_unlocked != NULL)
+		dev->driver->gem_free_object_unlocked(obj);
+	else if (dev->driver->gem_free_object != NULL) {
+		mutex_lock(&dev->struct_mutex);
+		dev->driver->gem_free_object(obj);
+		mutex_unlock(&dev->struct_mutex);
+	}
+
+	drm_gem_object_free_common(obj);
+}
+EXPORT_SYMBOL(drm_gem_object_free_unlocked);
+
+static void drm_gem_object_ref_bug(struct kref *list_kref)
+{
+	BUG();
+}
+
 /**
  * Called after the last handle to the object has been closed
  *
@@ -458,8 +487,10 @@ drm_gem_object_handle_free(struct kref *kref)
 		/*
 		 * The object name held a reference to this object, drop
 		 * that now.
+		*
+		* This cannot be the last reference, since the handle holds one too.
 		 */
-		drm_gem_object_unreference(obj);
+		kref_put(&obj->refcount, drm_gem_object_ref_bug);
 	} else
 		spin_unlock(&dev->object_name_lock);
 
@@ -477,11 +508,8 @@ EXPORT_SYMBOL(drm_gem_vm_open);
 void drm_gem_vm_close(struct vm_area_struct *vma)
 {
 	struct drm_gem_object *obj = vma->vm_private_data;
-	struct drm_device *dev = obj->dev;
 
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(obj);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(obj);
 }
 EXPORT_SYMBOL(drm_gem_vm_close);
 

drivers/gpu/drm/i915/i915_gem.c

@@ -128,9 +128,7 @@ i915_gem_create_ioctl(struct drm_device *dev, void *data,
 		return -ENOMEM;
 
 	ret = drm_gem_handle_create(file_priv, obj, &handle);
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_handle_unreference(obj);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_handle_unreference_unlocked(obj);
 
 	if (ret)
 		return ret;
@@ -488,7 +486,7 @@ i915_gem_pread_ioctl(struct drm_device *dev, void *data,
 	 */
 	if (args->offset > obj->size || args->size > obj->size ||
 	    args->offset + args->size > obj->size) {
-		drm_gem_object_unreference(obj);
+		drm_gem_object_unreference_unlocked(obj);
 		return -EINVAL;
 	}
 
@@ -501,7 +499,7 @@ i915_gem_pread_ioctl(struct drm_device *dev, void *data,
 							file_priv);
 	}
 
-	drm_gem_object_unreference(obj);
+	drm_gem_object_unreference_unlocked(obj);
 
 	return ret;
 }
@@ -961,7 +959,7 @@ i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
 	 */
 	if (args->offset > obj->size || args->size > obj->size ||
 	    args->offset + args->size > obj->size) {
-		drm_gem_object_unreference(obj);
+		drm_gem_object_unreference_unlocked(obj);
 		return -EINVAL;
 	}
 
@@ -995,7 +993,7 @@ i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
 		DRM_INFO("pwrite failed %d\n", ret);
 #endif
 
-	drm_gem_object_unreference(obj);
+	drm_gem_object_unreference_unlocked(obj);
 
 	return ret;
 }
@@ -1138,9 +1136,7 @@ i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
 		       PROT_READ | PROT_WRITE, MAP_SHARED,
 		       args->offset);
 	up_write(&current->mm->mmap_sem);
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(obj);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(obj);
 	if (IS_ERR((void *)addr))
 		return addr;
 

drivers/gpu/drm/i915/i915_gem_tiling.c

@@ -438,9 +438,7 @@ i915_gem_set_tiling(struct drm_device *dev, void *data,
 	obj_priv = obj->driver_private;
 
 	if (!i915_tiling_ok(dev, args->stride, obj->size, args->tiling_mode)) {
-		mutex_lock(&dev->struct_mutex);
-		drm_gem_object_unreference(obj);
-		mutex_unlock(&dev->struct_mutex);
+		drm_gem_object_unreference_unlocked(obj);
 		return -EINVAL;
 	}
 

drivers/gpu/drm/i915/intel_display.c

@@ -3553,11 +3553,10 @@ static int intel_crtc_cursor_set(struct drm_crtc *crtc,
 	intel_crtc->cursor_bo = bo;
 
 	return 0;
-fail:
-	mutex_lock(&dev->struct_mutex);
 fail_locked:
-	drm_gem_object_unreference(bo);
 	mutex_unlock(&dev->struct_mutex);
+fail:
+	drm_gem_object_unreference_unlocked(bo);
 	return ret;
 }
 
@@ -4476,9 +4475,7 @@ static void intel_user_framebuffer_destroy(struct drm_framebuffer *fb)
 		intelfb_remove(dev, fb);
 
 	drm_framebuffer_cleanup(fb);
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(intel_fb->obj);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(intel_fb->obj);
 
 	kfree(intel_fb);
 }
@@ -4541,9 +4538,7 @@ intel_user_framebuffer_create(struct drm_device *dev,
 
 	ret = intel_framebuffer_create(dev, mode_cmd, &fb, obj);
 	if (ret) {
-		mutex_lock(&dev->struct_mutex);
-		drm_gem_object_unreference(obj);
-		mutex_unlock(&dev->struct_mutex);
+		drm_gem_object_unreference_unlocked(obj);
 		return NULL;
 	}
 

drivers/gpu/drm/i915/intel_overlay.c

@@ -1179,7 +1179,7 @@ int intel_overlay_put_image(struct drm_device *dev, void *data,
 out_unlock:
 	mutex_unlock(&dev->struct_mutex);
 	mutex_unlock(&dev->mode_config.mutex);
-	drm_gem_object_unreference(new_bo);
+	drm_gem_object_unreference_unlocked(new_bo);
 	kfree(params);
 
 	return ret;

drivers/gpu/drm/nouveau/nouveau_display.c

@@ -39,11 +39,8 @@ nouveau_user_framebuffer_destroy(struct drm_framebuffer *drm_fb)
 	if (drm_fb->fbdev)
 		nouveau_fbcon_remove(dev, drm_fb);
 
-	if (fb->nvbo) {
-		mutex_lock(&dev->struct_mutex);
-		drm_gem_object_unreference(fb->nvbo->gem);
-		mutex_unlock(&dev->struct_mutex);
-	}
+	if (fb->nvbo)
+		drm_gem_object_unreference_unlocked(fb->nvbo->gem);
 
 	drm_framebuffer_cleanup(drm_fb);
 	kfree(fb);

drivers/gpu/drm/nouveau/nouveau_fbcon.c

@@ -401,10 +401,8 @@ nouveau_fbcon_remove(struct drm_device *dev, struct drm_framebuffer *fb)
 
 		unregister_framebuffer(info);
 		nouveau_bo_unmap(nouveau_fb->nvbo);
-		mutex_lock(&dev->struct_mutex);
-		drm_gem_object_unreference(nouveau_fb->nvbo->gem);
+		drm_gem_object_unreference_unlocked(nouveau_fb->nvbo->gem);
 		nouveau_fb->nvbo = NULL;
-		mutex_unlock(&dev->struct_mutex);
 		if (par)
 			drm_fb_helper_free(&par->helper);
 		framebuffer_release(info);

drivers/gpu/drm/nouveau/nouveau_gem.c

@@ -167,12 +167,10 @@ nouveau_gem_ioctl_new(struct drm_device *dev, void *data,
 
 	ret = drm_gem_handle_create(file_priv, nvbo->gem, &req->info.handle);
 out:
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_handle_unreference(nvbo->gem);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_handle_unreference_unlocked(nvbo->gem);
 
 	if (ret)
-		drm_gem_object_unreference(nvbo->gem);
+		drm_gem_object_unreference_unlocked(nvbo->gem);
 	return ret;
 }
 
@@ -865,9 +863,7 @@ nouveau_gem_ioctl_pin(struct drm_device *dev, void *data,
 		req->domain = NOUVEAU_GEM_DOMAIN_VRAM;
 
 out:
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(gem);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(gem);
 
 	return ret;
 }
@@ -891,9 +887,7 @@ nouveau_gem_ioctl_unpin(struct drm_device *dev, void *data,
 
 	ret = nouveau_bo_unpin(nouveau_gem_object(gem));
 
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(gem);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(gem);
 
 	return ret;
 }
@@ -935,9 +929,7 @@ nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data,
 	}
 
 out:
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(gem);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(gem);
 	return ret;
 }
 
@@ -965,9 +957,7 @@ nouveau_gem_ioctl_cpu_fini(struct drm_device *dev, void *data,
 	ret = 0;
 
 out:
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(gem);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(gem);
 	return ret;
 }
 
@@ -986,9 +976,7 @@ nouveau_gem_ioctl_info(struct drm_device *dev, void *data,
 		return -EINVAL;
 
 	ret = nouveau_gem_info(gem, req);
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(gem);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(gem);
 	return ret;
 }
 

drivers/gpu/drm/nouveau/nouveau_notifier.c

@@ -61,11 +61,8 @@ nouveau_notifier_init_channel(struct nouveau_channel *chan)
 
 	chan->notifier_bo = ntfy;
 out_err:
-	if (ret) {
-		mutex_lock(&dev->struct_mutex);
-		drm_gem_object_unreference(ntfy->gem);
-		mutex_unlock(&dev->struct_mutex);
-	}
+	if (ret)
+		drm_gem_object_unreference_unlocked(ntfy->gem);
 
 	return ret;
 }
@@ -81,8 +78,8 @@ nouveau_notifier_takedown_channel(struct nouveau_channel *chan)
 	nouveau_bo_unmap(chan->notifier_bo);
 	mutex_lock(&dev->struct_mutex);
 	nouveau_bo_unpin(chan->notifier_bo);
-	drm_gem_object_unreference(chan->notifier_bo->gem);
 	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(chan->notifier_bo->gem);
 	nouveau_mem_takedown(&chan->notifier_heap);
 }
 

drivers/gpu/drm/nouveau/nv04_crtc.c

@@ -926,9 +926,7 @@ nv04_crtc_cursor_set(struct drm_crtc *crtc, struct drm_file *file_priv,
 	nv_crtc->cursor.set_offset(nv_crtc, nv_crtc->cursor.offset);
 	nv_crtc->cursor.show(nv_crtc, true);
 out:
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(gem);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(gem);
 	return ret;
 }
 

drivers/gpu/drm/nouveau/nv50_crtc.c

@@ -358,9 +358,7 @@ nv50_crtc_cursor_set(struct drm_crtc *crtc, struct drm_file *file_priv,
 	nv_crtc->cursor.show(nv_crtc, true);
 
 out:
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(gem);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(gem);
 	return ret;
 }
 

drivers/gpu/drm/radeon/atom.c

@@ -881,8 +881,6 @@ static void atom_op_shl(atom_exec_context *ctx, int *ptr, int arg)
 	uint8_t attr = U8((*ptr)++), shift;
 	uint32_t saved, dst;
 	int dptr = *ptr;
-	attr &= 0x38;
-	attr |= atom_def_dst[attr >> 3] << 6;
 	SDEBUG("   dst: ");
 	dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1);
 	shift = atom_get_src(ctx, attr, ptr);
@@ -897,8 +895,6 @@ static void atom_op_shr(atom_exec_context *ctx, int *ptr, int arg)
 	uint8_t attr = U8((*ptr)++), shift;
 	uint32_t saved, dst;
 	int dptr = *ptr;
-	attr &= 0x38;
-	attr |= atom_def_dst[attr >> 3] << 6;
 	SDEBUG("   dst: ");
 	dst = atom_get_dst(ctx, arg, attr, ptr, &saved, 1);
 	shift = atom_get_src(ctx, attr, ptr);

drivers/gpu/drm/radeon/radeon_cs.c

@@ -194,11 +194,8 @@ static void radeon_cs_parser_fini(struct radeon_cs_parser *parser, int error)
 	}
 	radeon_bo_list_unreserve(&parser->validated);
 	for (i = 0; i < parser->nrelocs; i++) {
-		if (parser->relocs[i].gobj) {
-			mutex_lock(&parser->rdev->ddev->struct_mutex);
-			drm_gem_object_unreference(parser->relocs[i].gobj);
-			mutex_unlock(&parser->rdev->ddev->struct_mutex);
-		}
+		if (parser->relocs[i].gobj)
+			drm_gem_object_unreference_unlocked(parser->relocs[i].gobj);
 	}
 	kfree(parser->track);
 	kfree(parser->relocs);

drivers/gpu/drm/radeon/radeon_cursor.c

@@ -169,17 +169,13 @@ int radeon_crtc_cursor_set(struct drm_crtc *crtc,
 unpin:
 	if (radeon_crtc->cursor_bo) {
 		radeon_gem_object_unpin(radeon_crtc->cursor_bo);
-		mutex_lock(&crtc->dev->struct_mutex);
-		drm_gem_object_unreference(radeon_crtc->cursor_bo);
-		mutex_unlock(&crtc->dev->struct_mutex);
+		drm_gem_object_unreference_unlocked(radeon_crtc->cursor_bo);
 	}
 
 	radeon_crtc->cursor_bo = obj;
 	return 0;
 fail:
-	mutex_lock(&crtc->dev->struct_mutex);
-	drm_gem_object_unreference(obj);
-	mutex_unlock(&crtc->dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(obj);
 
 	return 0;
 }

drivers/gpu/drm/radeon/radeon_display.c

@@ -679,11 +679,8 @@ static void radeon_user_framebuffer_destroy(struct drm_framebuffer *fb)
 	if (fb->fbdev)
 		radeonfb_remove(dev, fb);
 
-	if (radeon_fb->obj) {
-		mutex_lock(&dev->struct_mutex);
-		drm_gem_object_unreference(radeon_fb->obj);
-		mutex_unlock(&dev->struct_mutex);
-	}
+	if (radeon_fb->obj)
+		drm_gem_object_unreference_unlocked(radeon_fb->obj);
 	drm_framebuffer_cleanup(fb);
 	kfree(radeon_fb);
 }

drivers/gpu/drm/radeon/radeon_gem.c

@@ -69,9 +69,7 @@ int radeon_gem_object_create(struct radeon_device *rdev, int size,
 		if (r != -ERESTARTSYS)
 			DRM_ERROR("Failed to allocate GEM object (%d, %d, %u, %d)\n",
 				  size, initial_domain, alignment, r);
-		mutex_lock(&rdev->ddev->struct_mutex);
-		drm_gem_object_unreference(gobj);
-		mutex_unlock(&rdev->ddev->struct_mutex);
+		drm_gem_object_unreference_unlocked(gobj);
 		return r;
 	}
 	gobj->driver_private = robj;
@@ -202,14 +200,10 @@ int radeon_gem_create_ioctl(struct drm_device *dev, void *data,
 	}
 	r = drm_gem_handle_create(filp, gobj, &handle);
 	if (r) {
-		mutex_lock(&dev->struct_mutex);
-		drm_gem_object_unreference(gobj);
-		mutex_unlock(&dev->struct_mutex);
+		drm_gem_object_unreference_unlocked(gobj);
 		return r;
 	}
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_handle_unreference(gobj);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_handle_unreference_unlocked(gobj);
 	args->handle = handle;
 	return 0;
 }
@@ -236,9 +230,7 @@ int radeon_gem_set_domain_ioctl(struct drm_device *dev, void *data,
 
 	r = radeon_gem_set_domain(gobj, args->read_domains, args->write_domain);
 
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(gobj);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(gobj);
 	return r;
 }
 
@@ -255,9 +247,7 @@ int radeon_gem_mmap_ioctl(struct drm_device *dev, void *data,
 	}
 	robj = gobj->driver_private;
 	args->addr_ptr = radeon_bo_mmap_offset(robj);
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(gobj);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(gobj);
 	return 0;
 }
 
@@ -288,9 +278,7 @@ int radeon_gem_busy_ioctl(struct drm_device *dev, void *data,
 	default:
 		break;
 	}
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(gobj);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(gobj);
 	return r;
 }
 
@@ -311,9 +299,7 @@ int radeon_gem_wait_idle_ioctl(struct drm_device *dev, void *data,
 	/* callback hw specific functions if any */
 	if (robj->rdev->asic->ioctl_wait_idle)
 		robj->rdev->asic->ioctl_wait_idle(robj->rdev, robj);
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(gobj);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(gobj);
 	return r;
 }
 
@@ -331,9 +317,7 @@ int radeon_gem_set_tiling_ioctl(struct drm_device *dev, void *data,
 		return -EINVAL;
 	robj = gobj->driver_private;
 	r = radeon_bo_set_tiling_flags(robj, args->tiling_flags, args->pitch);
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(gobj);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(gobj);
 	return r;
 }
 
@@ -356,8 +340,6 @@ int radeon_gem_get_tiling_ioctl(struct drm_device *dev, void *data,
 	radeon_bo_get_tiling_flags(rbo, &args->tiling_flags, &args->pitch);
 	radeon_bo_unreserve(rbo);
 out:
-	mutex_lock(&dev->struct_mutex);
-	drm_gem_object_unreference(gobj);
-	mutex_unlock(&dev->struct_mutex);
+	drm_gem_object_unreference_unlocked(gobj);
 	return r;
 }

drivers/gpu/drm/ttm/ttm_tt.c

@@ -480,7 +480,7 @@ static int ttm_tt_swapin(struct ttm_tt *ttm)
 	void *from_virtual;
 	void *to_virtual;
 	int i;
-	int ret;
+	int ret = -ENOMEM;
 
 	if (ttm->page_flags & TTM_PAGE_FLAG_USER) {
 		ret = ttm_tt_set_user(ttm, ttm->tsk, ttm->start,
@@ -499,8 +499,10 @@ static int ttm_tt_swapin(struct ttm_tt *ttm)
 
 	for (i = 0; i < ttm->num_pages; ++i) {
 		from_page = read_mapping_page(swap_space, i, NULL);
-		if (IS_ERR(from_page))
+		if (IS_ERR(from_page)) {
+			ret = PTR_ERR(from_page);
 			goto out_err;
+		}
 		to_page = __ttm_tt_get_page(ttm, i);
 		if (unlikely(to_page == NULL))
 			goto out_err;
@@ -523,7 +525,7 @@ static int ttm_tt_swapin(struct ttm_tt *ttm)
 	return 0;
 out_err:
 	ttm_tt_free_alloced_pages(ttm);
-	return -ENOMEM;
+	return ret;
 }
 
 int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistant_swap_storage)
@@ -535,6 +537,7 @@ int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistant_swap_storage)
 	void *from_virtual;
 	void *to_virtual;
 	int i;
+	int ret = -ENOMEM;
 
 	BUG_ON(ttm->state != tt_unbound && ttm->state != tt_unpopulated);
 	BUG_ON(ttm->caching_state != tt_cached);
@@ -557,7 +560,7 @@ int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistant_swap_storage)
 						0);
 		if (unlikely(IS_ERR(swap_storage))) {
 			printk(KERN_ERR "Failed allocating swap storage.\n");
-			return -ENOMEM;
+			return PTR_ERR(swap_storage);
 		}
 	} else
 		swap_storage = persistant_swap_storage;
@@ -569,9 +572,10 @@ int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistant_swap_storage)
 		if (unlikely(from_page == NULL))
 			continue;
 		to_page = read_mapping_page(swap_space, i, NULL);
-		if (unlikely(to_page == NULL))
+		if (unlikely(IS_ERR(to_page))) {
+			ret = PTR_ERR(to_page);
 			goto out_err;
-
+		}
 		preempt_disable();
 		from_virtual = kmap_atomic(from_page, KM_USER0);
 		to_virtual = kmap_atomic(to_page, KM_USER1);
@@ -595,5 +599,5 @@ int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistant_swap_storage)
 	if (!persistant_swap_storage)
 		fput(swap_storage);
 
-	return -ENOMEM;
+	return ret;
 }

include/drm/drmP.h

@@ -801,6 +801,7 @@ struct drm_driver {
 	 */
 	int (*gem_init_object) (struct drm_gem_object *obj);
 	void (*gem_free_object) (struct drm_gem_object *obj);
+	void (*gem_free_object_unlocked) (struct drm_gem_object *obj);
 
 	/* vga arb irq handler */
 	void (*vgaarb_irq)(struct drm_device *dev, bool state);
@@ -1427,6 +1428,7 @@ extern void drm_sysfs_connector_remove(struct drm_connector *connector);
 int drm_gem_init(struct drm_device *dev);
 void drm_gem_destroy(struct drm_device *dev);
 void drm_gem_object_free(struct kref *kref);
+void drm_gem_object_free_unlocked(struct kref *kref);
 struct drm_gem_object *drm_gem_object_alloc(struct drm_device *dev,
 					    size_t size);
 void drm_gem_object_handle_free(struct kref *kref);
@@ -1443,10 +1445,15 @@ drm_gem_object_reference(struct drm_gem_object *obj)
 static inline void
 drm_gem_object_unreference(struct drm_gem_object *obj)
 {
-	if (obj == NULL)
-		return;
+	if (obj != NULL)
+		kref_put(&obj->refcount, drm_gem_object_free);
+}
 
-	kref_put(&obj->refcount, drm_gem_object_free);
+static inline void
+drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
+{
+	if (obj != NULL)
+		kref_put(&obj->refcount, drm_gem_object_free_unlocked);
 }
 
 int drm_gem_handle_create(struct drm_file *file_priv,
@@ -1475,6 +1482,21 @@ drm_gem_object_handle_unreference(struct drm_gem_object *obj)
 	drm_gem_object_unreference(obj);
 }
 
+static inline void
+drm_gem_object_handle_unreference_unlocked(struct drm_gem_object *obj)
+{
+	if (obj == NULL)
+		return;
+
+	/*
+	* Must bump handle count first as this may be the last
+	* ref, in which case the object would disappear before we
+	* checked for a name
+	*/
+	kref_put(&obj->handlecount, drm_gem_object_handle_free);
+	drm_gem_object_unreference_unlocked(obj);
+}
+
 struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
 					     struct drm_file *filp,
 					     u32 handle);